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Frank Furter
It seems to me the regulations in Yosemite which are beyond those even at Seki or any other park I have visited based on inherently flawed reasoning.
I remember bear boxes at SEKI in day use areas with signs saying that food storage in the trunk wasn't acceptable even during the day. This was at Crystal Cave and Redwood Mountain Grove. I do remember waiting for my cabin to be ready at the Grant Village parking lot and said something to a ranger. It was still afternoon and a ranger said it wasn't a problem in broad daylight with people walking everywhere.
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Frank Furter
I think it is an fallacy that "food" visible or detected in a car is the main reason for breakins of a specific car. Every car that I have owned that carried kids has residual food in cracks and crevices. I don't think it is possible to eliminate food odors from any car that has had a food spill or even in which food has been consumed. There is an anecdotal story of a car breakin attributed to a mint in the glove box. Just seems highly unlikely that this sort of cause and effect exists. It is more likely that there is a degree of opportunistic, experimental desperation to bear break-ins that in retrospect, is attributed to some trivial food item in the vehicle.
Certainly having a large quantity of food increases the "Jackpot!" factor if a bear comes across it. If I left 20 lbs of smoked ribs covered in BBQ sauce in my trunk, that would probably be a good indication for a bear's keen sense of smell. However - it's probably more about the reward factor. It may be random whether or not a bear decides to break into a car, but the NPS has the thinking that if the bear manages to score food, it has positive reinforcement that breaking into cars yields food and will rely on that. There was "Camaro Bear" which found a good stash in a Camaro and then decided to break into maybe 20 more over the course of that summer.
I remember talking to a store employee at Stony Creek in Sequoia NF. Her thinking was that bears weren't stupid. Even they might realize that every car will have food smells, but will gauge how much is enough to spend the energy for a car break in. I had concerns that soda may have been spilled on my seats, and she said the best you can do is just blot it up and don't stress out too much.
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Frank Furter
One issue concerns the size of many family coolers and the size of the storage boxes. It seems wrong to "encourage" people to visit national parks essentially without any preparation or equipment requirements whatsoever yet upon arrival, have specific requirements for storage of coolers in small bear boxes. Sure, the info is on the website, but I doubt that every new visitor knows to check the website. Many large coolers just don't fit in the storage boxes. In addition, many minivans are used which do not have trunks for true storage. At the very least, there should be information on the roads prior to the park that large coolers will be a problem in the Valley or a secure location in the Valley to store the giant megacoolers.
Do they really break into minivans or other taller vehicles? I thought the technique was usually to peel open the door frame. Can a bear get high enough?
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Frank Furter
I remain baffled how the food preparation areas of the Valley, outdoor vending machines, outdoor eating areas (like the pizza deck at Curry) and the High Sierra Camps can have food exposed on a regular basis and still seem to be exempt from tight bear regulations. Some High Sierra Camps have outdoor grills that are left out overnight that are just dripping with meat residue and do not get disturbed by bears. The screens on High Sierra Camps are no more durable than the usual tent structures, yet food can be left in screened areas of HSCs but food cannot be kept in tents in campgrounds adjacent to the HSCs.
I can leave my stove and pots out, which I'm sure smell like food to a bear. I think it's well known that bears investigate the smells, but the main concern is whether or not they're rewarded for it with any actual food.